Solid-state battery three-electrode test device

Abstract

The utility model belongs to solid state battery test technical field discloses a kind of solid state battery three-electrode testing device.Solid state battery three-electrode testing device includes first fixture, second fixture, first electrode connecting component, second electrode connecting component and third electrode connecting component.Wherein, first fixture and second fixture can exert pressure to the battery to be detected along the stacking direction of battery to be detected.First electrode connecting component, second electrode connecting component and third electrode connecting component insulation seal stack are arranged between first fixture and second fixture, first electrode connecting component is electrically connected to negative plate, second electrode connecting component is electrically connected to reference electrode ring, and third electrode connecting component is electrically connected to positive plate.It is used to test the battery to be detected, and the comparison test of reference electrode is introduced, and pressure is applied to positive electrode, negative electrode, reference electrode, the close adhesion of positive electrode, negative electrode, reference electrode with solid state electrolyte sheet is realized, and test stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of solid-state battery testing technology, and in particular to a three-electrode testing device for solid-state batteries. Background Technology

[0002] Currently, automotive power batteries use traditional lithium-ion batteries. In recent years, the requirements for high energy density, safety, and durability of power batteries have become increasingly stringent, and solid-state batteries have attracted much attention due to their high energy density and high safety performance. Accurate measurement of the internal electrochemical changes is of significant reference value during the development of solid-state batteries.

[0003] Most existing test molds for traditional liquid and solid-state batteries are conventional two-electrode designs, meaning only the positive and negative electrodes are connected externally for performance testing. A few liquid battery test molds have three electrodes, including an additional reference electrode to provide a stable potential reference and ensure accurate electrode potential measurements. However, these test molds cannot apply pressure to the positive and negative electrodes, while solid-state batteries require pressure during stacking, making them unsuitable for use with liquid-state batteries.

[0004] Therefore, there is an urgent need for a three-electrode testing device for solid-state batteries to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a three-electrode testing device for solid-state batteries, which can introduce a reference electrode and apply pressure to the positive electrode, negative electrode, and reference electrode ring to achieve tight adhesion between the positive electrode, negative electrode, and reference electrode ring and the solid electrolyte sheet, thereby improving testing stability.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A solid-state battery three-electrode testing device is used to test a battery under test. The battery under test includes a positive electrode, a negative electrode, a reference electrode ring, and a solid electrolyte sheet. The positive electrode, the solid electrolyte sheet, and the negative electrode are stacked in sequence. The reference electrode ring is sleeved on the outer periphery of the positive electrode and connected to the solid electrolyte sheet.

[0008] The aforementioned solid-state battery three-electrode testing device includes:

[0009] The first clamp and the second clamp are capable of applying pressure to the battery under test along the stacking direction of the battery under test;

[0010] A first electrode connection assembly, a second electrode connection assembly, and a third electrode connection assembly are stacked in an insulated and sealed manner between the first clamp and the second clamp. The first electrode connection assembly is electrically connected to the negative electrode sheet, the second electrode connection assembly is electrically connected to the reference electrode ring, and the third electrode connection assembly is electrically connected to the positive electrode sheet.

[0011] Optionally, the first electrode connection assembly includes:

[0012] The first electrode connector has a mounting groove for accommodating the battery to be tested, and the bottom of the mounting groove is connected to the negative electrode plate.

[0013] The first electrode lead is connected to the first electrode connector and is used to electrically connect to the negative terminal of the detection equipment.

[0014] Optionally, the second electrode connection assembly described above includes:

[0015] The second electrode connector is insulated and sealed to the first electrode connector.

[0016] The second electrode lead is connected to the second electrode connector and is used to electrically connect to the reference electrode terminal of the detection equipment.

[0017] The first pressure block is connected to the second electrode connector, and the first pressure block abuts against the reference electrode ring;

[0018] A first insulating sleeve is fitted around the outer periphery of the first pressure block, and the first insulating sleeve abuts against the bottom of the mounting groove of the first electrode connector.

[0019] Optionally, the second electrode connection assembly further includes a first elastic element, which is connected between the second electrode connection and the first pressure block.

[0020] Optionally, the third electrode connection assembly described above includes:

[0021] The third electrode connector is insulated and sealed to the second electrode connector; a connecting post is provided on one side of the third electrode connector, and the connecting post is insulated and sealed through the second electrode connector.

[0022] The third electrode lead is connected to the third electrode connector and is used to electrically connect to the positive terminal of the detection equipment.

[0023] The second pressure block is connected to the connecting post and abuts against the positive electrode plate.

[0024] Optionally, the third electrode connection assembly further includes a second elastic element, which is insulatedly connected between the third electrode connection member and the second electrode connection member.

[0025] Optionally, the third electrode connection assembly further includes a second insulating sleeve, which is sleeved between the outer ring of the connecting post and the inner ring of the second electrode connector.

[0026] Optionally, the second electrode connection assembly further includes a first buffer insulation member disposed between the second electrode connector and the first electrode connector; and / or,

[0027] The aforementioned third electrode connection assembly further includes a second buffer insulation member, which is disposed between the aforementioned third electrode connection member and the aforementioned second electrode connection member.

[0028] Optionally, the second electrode connection assembly further includes a first seal, which is disposed between the second electrode connector and the first electrode connector; and / or,

[0029] The third electrode connection assembly further includes a second seal, which is disposed between the third electrode connection and the second electrode connection.

[0030] Optionally, it further includes a first insulating member disposed between the first clamp and the first electrode connection assembly; and / or,

[0031] It also includes a second insulating member disposed between the second electrode connection assembly and the third electrode connection assembly; and / or,

[0032] It also includes a third insulating element, which is disposed between the third electrode connection assembly and the second clamp.

[0033] Optionally, the device may also include several clamping components, each of which includes a column and a clamping nut. The columns are evenly distributed between the first clamp and the second clamp. One end of each column is fixedly connected to the first clamp, and the other end is provided with an external thread. The external thread passes through the second clamp and is threadedly connected to the clamping nut.

[0034] The beneficial effects of this utility model are:

[0035] This invention provides a three-electrode testing device for solid-state batteries. By setting up a first electrode connection assembly, a second electrode connection assembly, and a third electrode connection assembly, the positive electrode, negative electrode, and reference electrode of the battery under test are connected to the negative terminal, reference electrode terminal, and positive terminal of the testing device, respectively, thereby enabling the testing of the battery under test. The introduction of a reference electrode as a reference electrode ensures the accuracy of potential measurements of the positive and negative electrodes. Furthermore, the three electrode connection assemblies are fixedly clamped by a first clamp and a second clamp, which can apply pressure to the battery under test along the stacking direction. This applies pressure to the positive electrode, negative electrode, and reference electrode ring, ensuring tight adhesion between the positive electrode, negative electrode, and reference electrode ring and the solid electrolyte sheet, thus improving testing stability. Attached Figure Description

[0036] Figure 1 This is an exploded view of the battery to be tested provided in a specific embodiment of this utility model;

[0037] Figure 2 This is a schematic diagram of the structure of the solid-state battery three-electrode testing device provided in a specific embodiment of this utility model;

[0038] Figure 3 This is an exploded view of the solid-state battery three-electrode testing device provided in a specific embodiment of this utility model.

[0039] In the picture:

[0040] 1. Battery to be tested; 110. Positive electrode plate; 120. Negative electrode plate; 130. Reference electrode ring; 140. Solid electrolyte sheet;

[0041] 10. First clamp; 20. Second clamp;

[0042] 30. Clamping assembly; 31. Column; 311. External threaded part; 32. Clamping nut;

[0043] 40. First electrode connection assembly; 41. First electrode connector; 42. First electrode lead;

[0044] 50. Second electrode connection assembly; 51. Second electrode connector; 52. Second electrode lead; 53. First pressure block; 54. First insulating sleeve; 55. First elastic element; 56. First buffer insulating element; 57. First sealing element;

[0045] 60. Third electrode connection assembly; 61. Third electrode connector; 611. Connecting post; 62. Third electrode lead; 63. Second pressure block; 64. Second elastic element; 65. Second insulating sleeve; 66. Second buffer insulating element; 67. Second sealing element;

[0046] 71. First insulating component; 72. Second insulating component; 73. Third insulating component. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0048] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," and "abutting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0051] The following reference Figures 1 to 3 This invention introduces the three-electrode testing device for solid-state batteries.

[0052] This embodiment provides a solid-state battery three-electrode testing device for testing the battery 1 under test. It introduces a comparison test with a reference electrode and applies pressure to the positive electrode, negative electrode, and reference electrode to achieve tight adhesion between the positive electrode, negative electrode, and reference electrode and the solid electrolyte sheet 140, thereby improving the test stability.

[0053] It should be noted that the battery to be tested 1 in this embodiment is a solid-state battery.

[0054] Please refer to Figure 1 Specifically, the battery under test 1 includes a positive electrode 110, a negative electrode 120, a reference electrode ring 130, and a solid electrolyte sheet 140. The positive electrode 110, the solid electrolyte sheet 140, and the negative electrode 120 are stacked in sequence. The reference electrode ring 130 is sleeved on the outer periphery of the positive electrode 110 and connected to the solid electrolyte sheet 140, thus realizing the stacking of the battery under test 1.

[0055] Please refer to Figures 1 to 3 Specifically, the aforementioned solid-state battery three-electrode testing device includes a first clamp 10, a second clamp 20, a first electrode connection assembly 40, a second electrode connection assembly 50, and a third electrode connection assembly 60. The first clamp 10 and the second clamp 20 can apply pressure to the battery 1 under test along its stacking direction to apply pressure to the positive electrode 110, negative electrode 120, and reference electrode ring 130, thereby ensuring tight contact between the positive electrode 110, negative electrode 120, and reference electrode ring 130 and the solid electrolyte sheet 140, improving test stability.

[0056] The first electrode connection assembly 40, the second electrode connection assembly 50, and the third electrode connection assembly 60 are insulated and sealed stacked between the first clamp 10 and the second clamp 20. The first electrode connection assembly 40 is electrically connected to the negative electrode 120, the second electrode connection assembly 50 is electrically connected to the reference electrode ring 130, and the third electrode connection assembly 60 is electrically connected to the positive electrode 110. By connecting the first electrode connection assembly 40, the second electrode connection assembly 50, and the third electrode connection assembly 60 to the negative terminal, the reference electrode terminal, and the positive terminal of the testing equipment, respectively, the connection between the battery 1 to be tested and the testing equipment can be achieved, thereby enabling the testing of the battery 1 to be tested.

[0057] The solid-state battery three-electrode testing device in this embodiment, by setting up a first electrode connection component 40, a second electrode connection component 50, and a third electrode connection component 60, achieves the connection of the positive electrode 110, negative electrode 120, and reference electrode of the battery under test 1 to the negative terminal, reference electrode terminal, and positive terminal of the testing device, respectively, thereby realizing the testing of the battery under test 1. Furthermore, the introduction of a reference electrode as a reference electrode ensures the accuracy of the potential measurement of the positive electrode 110 and negative electrode 120. In addition, the first clamp 10 and the second clamp 20 fix and clamp the three electrode connection components, and the first clamp 10 and the second clamp 20 can apply pressure to the battery under test 1 along the stacking direction of the battery under test 1, thereby achieving pressure on the positive electrode 110, negative electrode 120, and reference electrode ring 130, ensuring tight adhesion between the positive electrode 110, negative electrode 120, and reference electrode ring 130 and the solid electrolyte sheet 140, improving the testing stability.

[0058] Please refer to Figure 1 and Figure 2 In this embodiment, both the first clamp 10 and the second clamp 20 are plate-shaped structures. The first electrode connection assembly 40, the second electrode connection assembly 50 and the third electrode connection assembly 60 are clamped and fixed by the two clamps, thereby achieving the pressing of the battery 1 to be tested and thus achieving the application of pressure to the battery 1 to be tested.

[0059] Specifically, pressure is applied between the first clamp 10 and the second clamp 20 via a press. That is, after the first electrode connection assembly 40, the second electrode connection assembly 50 and the third electrode connection assembly 60 are connected to the battery 1 to be tested, the first clamp 10 and the second clamp 20 clamp and fix them. Then, by applying pressure to the first clamp 10 and / or the second clamp 20, pressure can be applied to the battery 1 to be tested inside, thereby applying pressure to the positive electrode 110, the negative electrode 120 and the reference electrode ring 130.

[0060] Optionally, both the first clamp 10 and the second clamp 20 are made of stainless steel, which has high structural strength. After the first clamp 10 and the second clamp 20 are locked and fixed, pressure can be applied to the battery 1 to be tested inside. For example, both the first clamp 10 and the second clamp 20 are made of 304 stainless steel. Of course, in other embodiments, the first clamp 10 and the second clamp 20 may also be made of other metal materials with high structural strength, and no specific limitation is made here.

[0061] Furthermore, the solid-state battery three-electrode testing device also includes several clamping components 30. The clamping components 30 are used to lock the first clamp 10 and the second clamp 20. That is, after applying pressure to the first clamp 10 and the second clamp 20 and bringing them closer together, the clamping components 30 are used to lock the first clamp 10 and the second clamp 20, so that the first clamp 10 and the second clamp 20 maintain a certain pressure on the battery 1 to be tested, thereby clamping and fixing the first electrode connection component 40, the second electrode connection component 50 and the third electrode connection component 60.

[0062] Specifically, the clamping assembly 30 includes columns 31 and clamping nuts 32. Several columns 31 are evenly distributed between the first clamp 10 and the second clamp 20. One end of each column 31 is fixedly connected to the first clamp 10, and the other end has an external thread 311. The external thread 311 passes through the second clamp 20 and is threadedly connected to the clamping nut 32. After the first clamp 10 and the second clamp 20 are subjected to a certain pressure by the press, the locking action of the columns 31 and the clamping nut 32 maintains the first clamp 10 and the second clamp 20 under a certain pressure applied to the battery 1 under test, thereby better simulating the actual usage state of the solid-state battery and improving the accuracy of the test.

[0063] Optionally, the fixed connection between the column 31 and the first clamp 10 can be a threaded connection, welding, or other connection methods. As long as the fixed connection between the two is satisfied, no specific limitation is made here.

[0064] Please refer to Figures 1 to 3 In this embodiment, the first electrode connection assembly 40 includes a first electrode connector 41 and a first electrode lead 42. The first electrode connector 41 has a mounting groove for accommodating the battery 1 to be tested, and the bottom of the mounting groove is connected to the negative electrode plate 120. The first electrode lead 42 is connected to the first electrode connector 41 and is used for electrical connection with the negative terminal of the testing device. In use, the first electrode connector 41 is placed insulated on the first clamp 10, and the battery 1 to be tested is placed in the mounting groove with its negative terminal facing the first electrode connector 41, thus achieving electrical connection between the negative electrode plate 120 and the first electrode connector 41. Then, the negative electrode plate 120 is electrically connected to the negative terminal of the testing device through the first electrode lead 42. Furthermore, the mounting groove makes it easier to limit the position of the battery 1 to be tested.

[0065] Optionally, the first electrode connector 41 is made of stainless steel, which has certain conductivity and structural strength. For example, the first electrode connector 41 is made of 304 stainless steel. Of course, in other embodiments, the first electrode connector 41 may also be made of other metal materials with high structural strength, and this is not specifically limited here.

[0066] Specifically, the solid-state battery three-electrode testing device also includes a first insulating component 71, which is disposed between the first clamp 10 and the first electrode connection assembly 40. Specifically, the first insulating component 71 is disposed between the first clamp 10 and the second electrode connection assembly 51 to achieve insulation between the two.

[0067] Optionally, the first insulating element 71 may be made of insulating materials such as plastic, without specific limitations. For example, in this embodiment, the first insulating element 71 is made of polyetheretherketone (PEEK) plastic.

[0068] Further, the second electrode connection assembly 50 includes a second electrode connector 51, a second electrode lead 52, a first pressure block 53, and a first insulating sleeve 54. The second electrode connector 51 is insulated and sealed to the first electrode connector 41; the second electrode lead 52 is connected to the second electrode connector 51 and is used for electrical connection with the reference electrode terminal of the detection equipment; the first pressure block 53 is connected to the second electrode connector 51 and abuts against the reference electrode ring 130; the first insulating sleeve 54 is sleeved on the outer periphery of the first pressure block 53 and abuts against the bottom of the mounting groove of the first electrode connector 41. Through the installation of the second electrode connection assembly 50, the first pressure block 53 presses the reference electrode ring 130 tightly, and the reference electrode ring 130 is connected through the first pressure block 53 and the second electrode connector 51, and then through the second electrode lead 52, the electrical connection between the reference electrode ring 130 and the reference electrode terminal of the detection equipment is realized. Furthermore, the first insulating sleeve 54 provides insulation protection for the other structures in the battery under test 1, except for the negative electrode 120, and the first pressure block 53, ensuring that they do not come into contact with the first electrode connector 41. This ensures that the solid electrolyte sheet 140 does not react with other structures and extends the service life of the solid-state battery three-electrode testing device.

[0069] Specifically, both the second electrode connector 51 and the first pressure block 53 are annular structures to allow the third electrode connector 60 to pass through, facilitating the connection between the third electrode connector 60 and the positive electrode plate 110. It should be noted that the second electrode connector 51 and the second pressure block 63 are made of the same material as the first electrode connector 41; please refer to the material description of the first electrode connector 41 above, which will not be repeated here.

[0070] Optionally, the first insulating sleeve 54 may be made of insulating materials such as plastic, without specific limitations. For example, in this embodiment, the first insulating sleeve 54 may be made of polytetrafluoroethylene (PTFE).

[0071] Specifically, the second electrode connection assembly 50 further includes a first elastic element 55, which is connected between the second electrode connector 51 and the first pressure block 53. This enables the connection between the first pressure block 53 and the second electrode connector 51, providing elasticity between them and also providing a certain pressure for the sealing connection between the second electrode connector 51 and the first electrode connector 41, thereby improving the sealing performance between them.

[0072] Optionally, the first elastic element 55 may be made of an elastic structure such as a spring, without specific limitations. For example, in this embodiment, the first elastic element 55 is a spring, and its material is carbon spring steel or alloy spring steel.

[0073] Specifically, the second electrode connection assembly 50 also includes a first buffer insulation member 56, which is disposed between the second electrode connection member 51 and the first electrode connection member 41. This not only achieves insulation between the first electrode connection member 41 and the second electrode connection member 51, but also achieves a buffer connection between the two, preventing collisions during the assembly process and thus affecting the service life of the solid-state battery three-electrode testing device.

[0074] Optionally, the material of the first buffer insulation member 56 may include insulating materials with buffering properties such as silicone to achieve its buffering and insulating properties, without being specifically limited here.

[0075] Specifically, the second electrode connection assembly 50 also includes a first sealing element 57, which is disposed between the second electrode connection 51 and the first electrode connection 41; thereby achieving a seal between the second electrode connection 51 and the first electrode connection 41, and giving it good sealing performance and corrosion resistance, preventing the solid electrolyte sheet 140 from decomposing and deteriorating due to moisture or contact with oxygen.

[0076] Optionally, the material of the first seal 57 may include sealing materials such as fluororubber to achieve its sealing effect, without being specifically limited here.

[0077] Furthermore, the third electrode connection assembly 60 includes a third electrode connector 61, a third electrode lead 62, and a second pressure block 63. The third electrode connector 61 is insulated and sealed to the second electrode connector 51; a connecting post 611 is provided on one side of the third electrode connector 61, and the connecting post 611 is insulated and sealed through the second electrode connector 51; the third electrode lead 62 is connected to the third electrode connector 61, and the third electrode lead 62 is used for electrical connection with the positive terminal of the detection equipment; the second pressure block 63 is connected to the connecting post 611, and the second pressure block 63 abuts against the positive electrode plate 110. After the third electrode connector 61 is insulated and sealed to the second electrode connector 51, the connecting post 611 is insulated and sealed through the second electrode connector 51 and connected to the second pressure block 63. Then the second pressure block 63 presses the positive electrode 110, which not only presses the positive electrode 110, but also connects the positive electrode 110 to the third electrode connector 61, and realizes the electrical connection between the positive electrode 110 and the positive terminal of the detection equipment through the third electrode connecting lead.

[0078] Specifically, the third electrode connector 61 and the second pressure block 63 are made of the same material as the first electrode connector 41. Please refer to the material description of the first electrode connector 41 above, which will not be repeated here.

[0079] Specifically, the third electrode connection assembly 60 further includes a second elastic element 64, which is insulated between the third electrode connector 61 and the second electrode connector 51. This enables the connection between the second pressure block 63 and the third electrode connector 61, providing elasticity between them and also supplying a certain pressure for the sealed connection between the third electrode connector 61 and the second electrode connector 51, thereby improving the sealing performance. The second elastic element 64 is made of the same material as the first elastic element 55; please refer to the description of the structure and material of the first elastic element 55 above, which will not be repeated here.

[0080] Specifically, the third electrode connection assembly 60 further includes a second insulating sleeve 65, which is sleeved between the outer ring of the connecting post 611 and the inner ring of the second electrode connector 51, so as to achieve insulation of the connecting post 611 through the second electrode connector 51. The second insulating sleeve 65 is made of the same material as the first insulating sleeve 54, which can be referred to in the material description of the first insulating sleeve 54 above, and will not be repeated here.

[0081] Specifically, the third electrode connection assembly 60 also includes a second buffer insulation member 66, which is disposed between the third electrode connector 61 and the second electrode connector 51. This not only provides insulation between the second electrode connector 51 and the third electrode connector 61, but also provides a buffer connection between them, preventing impacts during assembly and thus affecting the lifespan of the solid-state battery three-electrode testing device. The second buffer insulation member 66 is made of the same material as the first buffer insulation member 56; please refer to the material description of the first buffer insulation member 56 above, which will not be repeated here.

[0082] Specifically, the third electrode connection assembly 60 further includes a second sealing element 67, which is disposed between the third electrode connection 61 and the second electrode connection 51. This achieves a seal between the third electrode connection 61 and the second electrode connection 51, and provides good sealing performance and corrosion resistance, preventing the solid electrolyte sheet 140 from decomposing and deteriorating due to moisture or contact with oxygen. The second sealing element 67 is made of the same material as the first sealing element 57; please refer to the material description of the first sealing element 57 above, which will not be repeated here.

[0083] Specifically, the solid-state battery three-electrode testing device also includes a second insulating component 72, which is disposed between the second electrode connection assembly 50 and the third electrode connection assembly 60. The second insulating component 72 is specifically disposed between the second electrode connection 51 and the third electrode connection 61 to achieve insulation between the two, thereby achieving insulation between the second electrode connection assembly 50 and the third electrode connection assembly 60.

[0084] Specifically, the solid-state battery three-electrode testing device also includes a third insulating component 73, which is disposed between the third electrode connection assembly 60 and the second clamp 20. The third insulating component 73 is specifically disposed between the second clamp 20 and the third electrode connection assembly 61 to achieve insulation between the two, thereby achieving insulation between the second clamp 20 and the third electrode connection assembly 60.

[0085] The materials of the second insulating component 72 and the third insulating component 73 are the same as those of the first insulating component 71. Please refer to the material description of the first insulating component 71 above. It will not be repeated here.

[0086] The following reference Figures 1 to 3 This paper describes the process of installing and testing the solid-state battery three-electrode testing device on the battery under test (1).

[0087] First, the first insulating member 71 is placed on the first clamp 10, then the first electrode connector 41 is placed, and the negative electrode 120, the solid electrolyte sheet 140, the positive electrode 110 and the reference electrode ring 130 are placed in the mounting groove of the first electrode connector 41 in sequence. Then, the second electrode connector 51 is placed, with a first sealing element 57 and a first buffer insulation element 56 between the second electrode connector 51 and the first electrode connector 41; and the first pressing block 53 with the first insulating sleeve 54 enters the mounting groove and presses onto the reference electrode ring 130; then, the third electrode connector 61 is placed, with a second insulation element 72, a second sealing element 67 and a second buffer insulation element 66 between the third electrode connector 61 and the second electrode connector 51, and the second insulating sleeve 65 is disposed in the inner ring of the second electrode connector 51; and the connecting post 611 passes through the second electrode connector 51 to press the second pressing block 63 onto the positive electrode sheet 110; finally, the third insulating element 73 and the second clamp 20 are placed, and pressure is applied to the second clamp 20 and the first clamp 10 by a press, and tightened by the clamping nut 32 to fix the first clamp 10 and the second clamp 20. During the pressure application and fixing process, both the first seal 57 and the second seal 67 are compressed. Due to the elastic force of the first elastic element 55 and the second elastic element 64, the compression force is even better, preventing seal failure during use and improving the sealing effect. Furthermore, pressure is applied to the battery 1 under test, achieving internal connection stability. The first electrode lead 42, the second electrode lead 52, and the third electrode lead 62 are then electrically connected to the negative terminal, reference electrode terminal, and positive terminal of the testing equipment, respectively, to begin the test.

[0088] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0089] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A three-electrode testing device for solid-state batteries, characterized in that, Used for testing a battery (1) under test, the battery (1) under test includes a positive electrode (110), a negative electrode (120), a reference electrode ring (130) and a solid electrolyte sheet (140), the positive electrode (110), the solid electrolyte sheet (140) and the negative electrode (120) are stacked in sequence, and the reference electrode ring (130) is sleeved on the outer periphery of the positive electrode (110) and connected to the solid electrolyte sheet (140). The solid-state battery three-electrode testing device includes: A first clamp (10) and a second clamp (20) are provided, which are capable of applying pressure to the battery under test (1) along the stacking direction of the battery under test (1); The first electrode connection assembly (40), the second electrode connection assembly (50), and the third electrode connection assembly (60) are stacked in an insulated and sealed manner between the first clamp (10) and the second clamp (20). The first electrode connection assembly (40) is electrically connected to the negative electrode plate (120), the second electrode connection assembly (50) is electrically connected to the reference electrode ring (130), and the third electrode connection assembly (60) is electrically connected to the positive electrode plate (110).

2. The solid-state battery three-electrode testing device according to claim 1, characterized in that, The first electrode connection assembly (40) includes: The first electrode connector (41) has a mounting groove for accommodating the battery to be tested (1), and the bottom of the mounting groove is connected to the negative electrode plate (120). The first electrode lead (42) is connected to the first electrode connector (41), and the first electrode lead (42) is used to electrically connect to the negative terminal of the detection device.

3. The solid-state battery three-electrode testing device according to claim 2, characterized in that, The second electrode connection assembly (50) includes: The second electrode connector (51) is insulated and sealed to the first electrode connector (41). The second electrode lead (52) is connected to the second electrode connector (51), and the second electrode lead (52) is used to electrically connect to the reference electrode terminal of the detection device; The first pressure block (53) is connected to the second electrode connector (51), and the first pressure block (53) abuts against the reference electrode ring (130). The first insulating sleeve (54) is sleeved on the outer periphery of the first pressure block (53), and the first insulating sleeve (54) abuts against the bottom of the mounting groove of the first electrode connector (41).

4. The solid-state battery three-electrode testing device according to claim 3, characterized in that, The second electrode connection assembly (50) further includes a first elastic element (55), which is connected between the second electrode connector (51) and the first pressure block (53).

5. The solid-state battery three-electrode testing device according to claim 4, characterized in that, The third electrode connection assembly (60) includes: The third electrode connector (61) is insulated and sealed to the second electrode connector (51); a connecting post (611) is provided on one side of the third electrode connector (61), and the connecting post (611) is insulated and sealed through the second electrode connector (51). The third electrode lead (62) is connected to the third electrode connector (61), and the third electrode lead (62) is used to electrically connect to the positive terminal of the detection device; The second pressure block (63) is connected to the connecting post (611), and the second pressure block (63) abuts against the positive electrode plate (110).

6. The solid-state battery three-electrode testing device according to claim 5, characterized in that, The third electrode connection assembly (60) further includes a second elastic element (64), which is insulatedly connected between the third electrode connector (61) and the second electrode connector (51).

7. The solid-state battery three-electrode testing device according to claim 5, characterized in that, The third electrode connection assembly (60) further includes a second insulating sleeve (65), which is sleeved between the outer ring of the connecting post (611) and the inner ring of the second electrode connector (51).

8. The solid-state battery three-electrode testing apparatus according to claim 5, characterized in that, The second electrode connection assembly (50) further includes a first buffer insulation member (56), which is disposed between the second electrode connector (51) and the first electrode connector (41); and / or, The third electrode connection assembly (60) further includes a second buffer insulation member (66), which is disposed between the third electrode connection member (61) and the second electrode connection member (51).

9. The solid-state battery three-electrode testing apparatus according to claim 5, characterized in that, The second electrode connection assembly (50) further includes a first seal (57) disposed between the second electrode connector (51) and the first electrode connector (41); and / or, The third electrode connection assembly (60) further includes a second seal (67), which is disposed between the third electrode connection (61) and the second electrode connection (51).

10. The solid-state battery three-electrode testing apparatus according to claim 1, characterized in that, It also includes a first insulating element (71) disposed between the first clamp (10) and the first electrode connection assembly (40); and / or, It also includes a second insulating member (72) disposed between the second electrode connection assembly (50) and the third electrode connection assembly (60); and / or, It also includes a third insulating element (73) disposed between the third electrode connection assembly (60) and the second clamp (20).

11. The solid-state battery three-electrode testing apparatus according to any one of claims 1-10, characterized in that, It also includes several clamping components (30), each clamping component (30) including a column (31) and a clamping nut (32). Several columns (31) are evenly distributed between the first clamp (10) and the second clamp (20). One end of each column (31) is fixedly connected to the first clamp (10), and the other end is provided with an external thread (311). The external thread (311) passes through the second clamp (20) and is threadedly connected to the clamping nut (32).

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